The European Patent Office (EPO), established on October 7, 1977, is an intergovernmental organization operating under the European Patent Convention. It is responsible for examining and granting European patents that can take effect in 42 countries.

  The EPO ranks among the world's most authoritative and modern patent offices, possessing the most comprehensive patent documentation resources, advanced patent information retrieval systems, and extensive experience in patent examination, appeals, and legal research. The China National Intellectual Property Administration has engaged in extensive exchanges with the EPO regarding literature collection, retrieval systems, examiner training, and information products.

  CnOpenData presents European Patent Office patent data, encompassing essential information fields such as patent applicant(s), inventor(s), IPC classification codes, CPC classification codes, C-sets classification codes, application date, publication date, and publication number collections, supporting relevant research endeavors.

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